Bumper structure



April 24, 1928.

' 1,667,530 F. G. BREMER BUMPER STRUCTIjRE Filed Dec. 6, 1927 2Sheets-Sheet 1 .mvENToR X My April 24, 1928. 1,667,530

F. G. BRE'MER BUMPER STRUCTURE Filed Dec. 6, 1927 2 Sheets-Sheet 2ENVENTOR Patented Apr. 24, T1928.

FREDERICK" G. BREME-R OF- rI r r'rsBuRGH, --P.ENI\TSYLV ANIA., ASSIGNQRITO--UN1T STATES, CHAIN- & roneme I COMPANY, or

PITTSBURGH, PE Ns vANImfi' colt: q

BUMPER sTRUo'TUnEif p g Ap il icatio'nfiled December 6; iea'ifserialK052383066? Another ob ect"of myinvention is to pmvide'an-improve'd form of "buffer springs automobile bumpers.

Still -anotherob]ect' of for said springi" g V I 1 Some of the formswhich my invention may take are shown in 'tli'eflaccompanying the lineIIII of Fig. 1, and Figsuii t, 5,

6, 7, 8 and 9 arevieWs-sh0wing modifications ble curvedportionthereof.

1 In Fig. 5, 1 show a s ngle bufl'er spring 23 whose inner end-issecured'to a vehicle -frame andwhose outer' end is curved for-* V"wardlyfand backwardlyto, embrace-a bufler of the bufferspring device ofFig. 2.

Referring'inore particularly to Figs. 1 an d" 2, I show" a structurewherein an -impact'-' receivingbar 11 is connected to the forward endsor the vehicle frame" members 12, through the 'medium "of 'abufferspri'ng structure"comprising strap-like members 13 of spring steelor the like,"be'nt to theformi shown in Fig. 2, and auxiliaryspring=1nem'-fbersj14f The inner ends of thes'prings 13 and 14 areflattened and secured to the ends ofthe frame members12 by means of"screws 15 and 16. The outer endportion of eachfsprin'g13 is bent tosubstantially circular form, so that it will serve as a clamping collarfor {connecting the'impact bar 11 to the buffer spring, when'the nut onthe bolt 17 is tightened. Thebolt 17 also serves to connect the outerendof the auxiliary spring 14 to thespring 13 and the bumper bar. Itwill be seenthat the leaf 14 maybe employed or not as desired,'and

that additional strengthening or reinforcing leaves corresponding to thespring 14v can be provided-when required." It will further be seen thatit is unnecessary to employ, a clamping collar or other means ofattachment to the impact bar in addition to the bolt 17 and the spring13.

Fig. 3 shows a structure wherein bufi'er springs 18 and 18 are bolted attheir inner.

to automobile-- 7 (my invention-is to provide abufl'er structure'o'f'such form that it can be more convenientlyaddedto a main i buflerfspringwithoutchanging'the form of clamping olt 24: isdisposed'rea-rwai'dly of :ends to the vehicle :trame,*the outersend dfwthe spring 18 bein-gcurved' abOutithebumPer' bar and 'clamped inposition thereonf'bya" bolt 19fwhich may alsoextend-through "the? outer'end'ofthe= spring 18 and clamp they? "same-in position. The sp'ring';18 "f'can-"be-60 considered auxiliary spring andcould bedlspensed'withyif desired, under' 'con diti0ns wherein thespring18 'is deemedtohave requisite" strengthL- In Fig. 4,-Ishow a buffer springstrdcture' wformed of a single strip'iofrnaterial 21 that-' has itsends flattenedandsecuredtothe ve j I hicle frame, the intermediate portions-bf thespring being curved and "its outenpo'ltionbent to 'circularform toserve'as'a clamping collar forJthe-impact-bar when thedrawing,lvylierein Figure" I is afra'gmentary" b01t22fiis tightenedzrrItwillbe' noted 'that plan View" of a bumper *structu're connected to theends of vehicle frame members; 2 is a vie'wyonanfenlargedscale, takenon.

upper cm-ve'd'portion'of "the springto serve 9 as a'yicldableistrut"forthe' loive'rniore flext i relation, This ="arrangement "permitsTthe "I5bar. It will be seen that' the outer portion of thisls 'ring'23 is "soformed-, t hat the and'b'elow the impactb'ar in suchi'nanner that'it isnot-readily visi-ble 'to one standing 'in front'fof the car; thusadding-t0 the appearance of the device; v p v y Figure 6 shows .astructure wl1erein"-a single -spring 25 is folded upon itself andbent'to substantially the form' showni-n Figj 55 the inner, endsthereof, however, I

being spaced apart, so as to producea bra-'c-'= 7 ing effect of theupper inner end portion, es similar to that'produced by the member- 21of Fig. 4. A clamping bolt 26 is emp'l0yed,' with its co-operatingnut'27 dis osed'within the fold at theoute'r endo I Lthe' springstructure. I

connected-to the impact' bar-i'n substantially 77 the same manner as isthe'spring 23 of Fig. 5. However, this latter form of device extendsupwardly and forwardly from the vehicle frame instead of beingloopeddownwardly and then upwardly. s

Fig. 8 shows a structure similar to Fig.

Law

. v v "IOU In 7I show a-buffer springz28 thatis,

7, but wherein the strip 29is so folded upon itself, that it is doublethroughout its entire length, for the purpose of providing greaterstrength.

Fig. 9 shows a spring 30 of substantially the form of the spring 28 ofFig. 7 but the spring 80 is supplemented by additional spring leaves 31and 32 that lie against the spring 30 and whose inner ends are clampedbetween the vehicle frame and the inner end of the spring 30.

'saidportion in clamping engagement with an impact bar, the inner end ofsaid member being arranged for attachment to a supporting member, and areinforcing spring 'detachably secured at both ends to said yieldablemember.

3. Butter spring structure comprising a yieldable member having itsinner end p0rtion extending in a Vertical line for attachment to a framemember and its outer portion bent to annular form, and means holtL ingsaid annular portion in clamping engagement with animp'act bar.

a. Butter spring structure comprising a yieldable member having itsinner end portion extending in a vertical line for attachment to a framemember and its outer portion bent to annular form, a supplementary ablemember in clamping engagement with a bumper bar.

6. Butler spring structure comprising a yieldable member arranged at oneend for said point of connection.

yieldable portion having an eye formed therein, a yieldable reinforcingportion, and

means for attaching said portions to a sup-.

port and to an impact bar, the said portions being bent in oppositedirections for a por t1on or their length.

8. Butler spring structure comprising a yieldable portion having an eyeformed in its outer end, means for securing an impact bar to the eyeportion, and a second yield able portion extending from" the inner endtothe outer end of the first-named portion and detachably' but rigidlysecured thereto. v

9. Buffer spring structure comprising a yieldable port on having an. eyeformed therein, means for holding an impact bar in i said eye, a secondyieldable portion, and

means for connecting the inner ends of said portions to a support, thesecond-named portion extending from said connect-ing means in adirection generally opposite to the direction in which the first-namedportion means for connecting the inner ends of said;

portions tov a support, the second-named portion extending from saidconnecting means in a direction generally opposite to the directioninwhich the first-named poly I tion extends therefrom, and being connectedto said bar-holding means.

llfBufl'er spring structure comprising yieldable portion having aneyeformed in its outer end, means for holding an impact bar in assembledrelation with said. eye, a

second yieldable portion, means for connecting the inner ends of saidportions to a support, and means for portions extending upwardly andoutwardly from the point of connection to said support and the other ofsaid portions extending downwardly and upwardly with respect to Intestimony whereof I, the said Fann- ERICK Gr. Bnniunn, havehereunto setmyhand. r I I I FREDERICK BREMER.

connects ing the outer ends thereot, one of said' entends tllGlQrrODl,and having overlappmg

